Question

Choose the correct sequence for the direction of blood flow in a healthy human being starting and ending with the left ventricle.

• A. Left ventricle → Aorta → Systemic arteries → Systemic veins → Vena cavae → Pulmonary vein → Pulmonary artery → Right ventricle → Left ventricle
• B. Left ventricle → Aorta → Systemic arteries → Systemic veins → Vena cavae → Right ventricle → Pulmonary artery → Pulmonary vein → Left ventricle
• C. Left ventricle → Systemic arteries → Aorta → Systemic veins → Right ventricle → Pulmonary artery → Pulmonary vein → Left ventricle
• D. Left ventricle → Aorta → Systemic arteries → Vena cavae → Systemic veins → Right ventricle → Pulmonary artery → Pulmonary vein → Left ventricle

Hint:

The correct flow of blood starts at the left ventricle, moves through the systemic circulation, then to the lungs for oxygenation, and finally returns to the left ventricle for circulation again.

Answer 1

The Correct Option is B

Step 1: Understanding the circulatory system.
The blood flow in the human circulatory system follows a specific route starting and ending in the heart. The left ventricle pumps oxygenated blood to the body via the aorta. After reaching the organs and tissues, the blood returns through the systemic veins to the vena cavae, then enters the right atrium and ventricle. The right ventricle pumps the deoxygenated blood to the lungs through the pulmonary artery. Oxygenated blood returns to the left atrium and ventricle via the pulmonary vein. Step 2: Evaluating the options.
- (A) and (C) are incorrect due to incorrect routes of the systemic and pulmonary circulations.
- (D) is incorrect due to the wrong order of blood flow.
- (B) correctly represents the flow starting from the left ventricle, going through the aorta, systemic circulation, vena cavae, and the right ventricle, and then to the lungs before returning to the left ventricle. Step 3: Conclusion.
Therefore, the correct answer is (B).